So Ukraine has a big stock of Mig-29 parts
From bpmd via Yandex
Ukraine, Bulgaria, the MiG-29 and possible counterfeit
September 11th, 11:35
As the Bulgarian magazine "Aero" in the publication of the Ukrainian company has dostawa parts for the MiG-29, the Ministry of defence of Bulgaria chose GK GHVIP "Ukrinmash" (part of GP "Ukroboronprom") as the winner in the open tender announced on 15 April 2016. Under the contract the Ukrainian company is to supply to the customer a set of spare parts for the MiG-29. The contract amount is 4066266 leva (2,348 million dollars). In second place in the list of bids was the Bulgarian company Armar Corporation General Technical Cooperation Ltd, which bid 4148186 leva (2,395 million dollars). The contract with the winner should be signed in September or early October 2016.
According to tender terms, the winner must supply new and used spare parts and consumables for continued airworthiness fleet of MiG-29 fighters. Protocol of negotiations between the "Ukrinmash" and the Bulgarian military contains some interesting details. One of the questions addresses the issue of how Ukrainian supplier can prove that the exported to Bulgaria spare parts are new and unused. The answer lies in the fact that the spare parts are new, and this will be confirmed by the necessary accompanying documents (passports and certificates).